Java類中打印this導致手機不能啟動問題

問題1：發現在Handler中加類似Log.d(TAG,"create handler 1 "+ this);導致系統不能啟動。

1. public class Handler {
2. public Handler() {
3. if (FIND_POTENTIAL_LEAKS) {
4. final Class<? extends Handler> klass = getClass();
5. if ((klass.isAnonymousClass() || klass.isMemberClass() || klass.isLocalClass()) &&
6. (klass.getModifiers() & Modifier.STATIC) == 0) {
7. Log.w(TAG, "The following Handler class should be static or leaks might occur: " +
8. klass.getCanonicalName());
9. }
10. }
12. mLooper = Looper.myLooper();
13. if (mLooper == null) {
14. throw new RuntimeException(
15. "Can't create handler inside thread that has not called Looper.prepare()");
16. }
17. mQueue = mLooper.mQueue;
18. Log.d(TAG,"create handler 1 "+ this)； //本行代碼導致系統不能啟動
19. mCallback = null;
20. }
22. @Override
23. public String toString() {
24. return "Handler (" + getClass().getName() + ") {"
25. + Integer.toHexString(System.identityHashCode(this))
26. + "}";
27. }

問題2：在Handler.toString中加打印this語句導致不能啟動

1. @Override
2. public String toString() {
3. Log.d(TAG,"this="+this);
4. return "Handler (" + getClass().getName() + ") {"
5. + Integer.toHexString(System.identityHashCode(this))
6. + "}";
7. }